There are 4 Travel Air 4-D aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top.
N697K
1930 Travel Air 4-D
Falls Church, VA
N442N
Travel Air 4-D
Grand Prairie, TX
N476N
Travel Air 4-D
Thousand Oaks, CA
N9915
Travel Air 4-D
Athens, AL